Factual error: When you first see Sam he is supposed to be in America, but when you see out of the window as he is leaving, you can see the Gherkin building in London. He is actually in the Lloyd's Building, but to add to the illusion of being in America, he is picked up by a Yellow Cab.

Factual error: Sam and Donna would not be able to marry. There are things which need to be done before it is legal for two people to marry and it is therefore not possible to marry minutes after proposing.

Abba's Benny Anderson and Bjorn Ulvaeus have cameos. One is seen during 'Dancing Queen', playing piano near a boat, and the other is seen near the end of the 'Waterloo' sequence, which plays over the credits.